1235293 - Youtube will only play videos at 360p in Windows XP in latest Firefox

Status: RESOLVED DUPLICATE of bug 1233970

(Firefox :: Untriaged, defect)

Description

[Eric]

User Agent: Mozilla/5.0 (Windows NT 5.1; rv:43.0) Gecko/20100101 Firefox/43.0
Build ID: 20151221130713

Steps to reproduce:

On a secondary PC I use as a fileserver primarily, it still runs Windows XP (I know, but I was going to swap things over once I get new hardware and convert it all to linux soon). 

I got the notice to upgrade Firefox, which I did. 

Occasionally while gaming on main pc (win7) I use the older pc for email/forum/youtube, All youtube videos now will only play at 360p. 

Right clicking the player shows it's the html5 player, I have latest version of flash installed. 

When clicking the roung "cog" icon, then in Quality it only lists 360p then above it in Quality section it says "Missing Options?" 

When I go to youtube.com/html5 all codecs have checkboxes except 2.

h264 is red exclamation point.
MSE & h264 is red exclamation point.


going to html5test.com, under Video section it shows:
Codecs
MPEG-4 ASP support: No 
H.264 support: No  


Actual results:

Youtube on older WinXP can't play any videos above 360p quality, even though before upgrading to latest version of Firefox it was playing 1080p HD full screen just fine.

Deadpool official trailer: https://www.youtube.com/watch?v=ZIM1HydF9UA
Paste of "Stats for Nerds" when right clicking the youtube html5 player window:

Video ID: ZIM1HydF9UA
Dimensions: 854 x 480
Resolution: 640 x 360
Volume: 100%
Stream Host:
Stream Type: https
CPN: HXX0nJJK-TphHgkH
Mime Type: video/webm; codecs="vp8.0, vorbis"
DASH: no (43)


Expected results:

Prior to upgrading Firefox, never had any issue playing all HD quality on the older computer. While yes it's soon to be upgraded as I'm swapping motherboard/cpu/ram and adding ssd and setting up linux on it, It's primarily used as a fileserver as I kept throwing hard drives in it and use it as a local backup system to avoid "cloud", but never saw any notice of HD being dropped on older systems on either browser or youtube's site. 


I am unsure why h264 is showing as not active, In the "plugins" section of Firefox there is a plugin that came preinstalled with browser called OpenH264 Video Codec provided by Cisco Systems Inc. It is set to be active, and plugin page shows up to date.

Comment 1

[Eric]

Attachment: Youtube Screenshot of video window with "stats" and quality "missing"

added screenshot of html5 "stats for nerds" and the bottom right "Missing option" in quality.